Drill cutter mounting



Au .25,1931. .J. R. DALLERUP 1,820,379

DRILL CUTTER MOUNTING Filed Jan. 19, 1929 Ja/m a Dal/amp INVENTOR ATTORN EY Patented Aug-125, 1931 JOHN nnnmaor, or nous'ron, Taxes, a'ssronon 10 3min 301mm 1m: comm,

. uNITEo-sr-ATEs PATENT :o-FFlCE 7 OF HOUSTON, "TEXAS, A CORPORATION .OF' TEXAS DRILL co'r'rnn noun'rme I Application filed January 19, 1929. Serial No. 388,691.

This invention relates to drills, and more particularly to drill cutter mountings.

The invention has for one of its specific objects the provision of an adjustable cutter mounting whereby a cutter may be mounted in various ositions in a drill headto successively per orm the functions of cutters drop outof the head. In order that the portions 10' may i at the same time to eliminate the necessity of of different sizes. a

Other objects and uses will hereinafter appear.

Referring to the accompanying drawings,

Fig. 1 is a fragmentary sectional side eleva- 2, is of the type having a pair of oppositely depending extensions 1a with a recess'1b therebetween, into which water or slush-is discharged fromthe central course 10. Extensions la form bearings for. the cross roller cutter pin 2.

If the lowermost portions 1a of extensions 1a are not of suflicient thickness; that is, if.

there is insuflicie-nt materialrbelow the bore in which the pin 2 is secured, the portions 1a are worn away in the use-of the bit, and pin 2, with cross roller cutters 3-thereon, will be of suilicient thickness and changing the usual size or position of the cutters, the invention provides the pin 2 of non-circular cross section and co-operating I f volve. The pin 14. may be held in place by a,

gibs a, b, and c. "As shown, the pin 2 is o a square cross section andthe gibs b, and a of rectangular cross sections, but it is to be understood that the forms thereof may be changed.

Cross roller cutters 3 are mounted upon cylindrical bushing 5, which has a borev adapted to non-rotatably receive the. pinand gibs. A bridge 6, of the usual type, ma

be used as a' sup erably made of aplatehavin an opening through which bushing-5 exten ,s, and having 7 an upper end shaped to rest against the upper to Fig. 1; Fig. 3, afragmentary side rt.-. This bridge is pre wall of recess 1?). 7 Pin 2 may besecured in place by means of a set-screwv 7, or other WISB.

The gibs a, b, and o are of difi erentthicb 1-] nesses, as shown 1n the drawings, and the gibs and the pin are separable. It will be obvious that when the gibs a, b, and c are on the,up-

permost side of the pin' 2, the cutters 3 will be in their uppermost position in the head; and when the gibs a, b, and 0 are on the lowermost side of the pin 2 the cutters will be in their lowermost position in the head and Intermediate positions of the cutters may be effected by lacing one or more of the gibs a on one si e of the pin and the remaining.

gib' or gibs on the other. Referring now toFigs. 3 and 4a. To increase the diameter of a well bore, it is now the custom to remove the original reaming cutters from the head and to mount largerv cutters in the place thereof, the bit heads now c in useoeing so constructed that cutters of. f

various sizes may be mounted therein. And

at times it is necessary to remove the original cutters and to mount smaller cutters in the place thereof to permit the passage of the bit through a pipe casing of small internal diameter. It is, therefore necessary for the driller to have on hand reaming cutters of various sizes." The ap-' plication of this invention ,to reamers is illus tratedby Figs..3 and 4, wherein the reamer a' comparatively body 12 has a roundedrece'ss 12a in which the reamer cutters '13. are mounted. Ajpin 14 of non-circular cross section andgibs d e and f-no'n-rotatably support-cylindrica.

bushing 16 upon which reamer cutters 13 resuitable retaining set'screw 17. It. may. be advantageous mount the reamers in their innermost position. To do this it is necessary only. to lace "the gibs d, e and f on the innermostsi e of the pin 14. Should it become necessary to cut a 'boreof a relatively great diameter, the'gibs d, e and f may be moved to the outermost.

side of the pin 14. Thus, the position of the reamer cutters 13 may be so varied that they will perform the function of a smaller or a larger reamer.

Should it become desirable to mount the reamer in, any intermediate position, one or more of the gibs may be moved from one side of the pin to the other.

If desired, a supporting bridge 18 may be used as shown in Fig. 3. p

- While I have illustrated and described the use of three gibs of different thicknesses, it is to be understood that any number of gibs of any form may be used to edect different adjustments. And so my invention is not limited to the preferred embodiment illustrated and described.

I claim:

1. In a drill, a head, a pin non-rotatably supported by said head, a plurality of gibs, a bushing upon said pin. and gibs, and a cutter supported by said bushing, said gibs being capable of occupying a plurality of positions in. said bushing relative to said pin to vary the position of said cutter with respect to said head,

, 2.. In a drill, a head, a pin non-rotatably supported by said head, said pin being noncircular in cross section, a plurality of gibs, a bushing on said pin and gibs, and a cutter on said bushing, said gibs being capable of occupying a plurality of positions in said bushing relative to said pin to vary the position of said cutter with respect to said head.

3. In a drill, a head, a pin non-rotatably supported by said head, a plurality of gibs, a bushing having a bore shaped to non-rotatably receive said pin and gibs, and a roller circular in cross section,a pluralit cutter on said bushing, said gibs being capable of occupying a plurality of positions in said bore relative to said pin to vary the position of said cutter with respect to said head.

' 4. In a drill, a head, a pin non-rotatably supported by said head, a plurality of gibs of difi'erent sizes, a bushing upon said pin and gibs, and a cutter supported by said bushing, said gibs being capable of occupying a plurality of positions in said bushing relative to said cutter said pin to vary the position of with respect to said head.

5. In a drill, a head, a pin non-rotatably supported by said head, saidpin beingE nop- 0 g1 s of different sizes, a bushing on sai pin and gibs, and a cutter on said bushing, said gibs eing capable of occupying a plurality of positions in said bushing relative to said pin to vary the position of said cutter with respect to said head 7 In a drill, a head, a pin non-rotatably supported by said head, a plurality of gibs, and a cutter on and supported by said pin and gibs,said gibs being capable of occupying a plurality of positions in said cutter relative to said pin to vary the position of said cutter with respect to said head.

8. In a drill, a head, a pin non-rotatably supported by said head, said pin being noncircular in cross-section, a plurality of gibs, and a cutter on and supported by said pin and gibs, said gibs being capable of occupying a plurality of positions in said cutter relative to said pin to vary the position of said cutter with respect to said head.

9. In a drill, a head, a pin non-rotatably supported by said head, a plurality of gibs of different sizes, and a cutter on and supported by said pin and gibs, said gibs being capable of occupying a plurality of positions in said cutter relative to said pin to vary the position of said cutter with respect to'said head.

10. In a drill, ahead, a pin non-rotatably supported by said head, said pin being noncircular in cross section, a plurality of gibs of difierent sizes, and a cutter on and supported by said pin and gibs, said pibs being capable of occupying a plurality 0 positions in said cutter relative to said pin to vary the position of said cutter with respect to said head.

In testimony whereof, I hereunto afiix my signature.

JOHN R. DALLERUP.

to varythe position of said cutter with respect to said head.

'6. In a drill, a head, a pin non-rotatably supported by said head, a plurality of gibs of different sizes, a bushing having a bore shaped to non-rotatably receive said pin and gibs, and a roller cutter on said bushing, said gibs being capable of occupying a pluralityof positionsin said bore relative to said pin 

